Sublime Text can highlight HTML. It can highlight Go. I would like to tell Sublime Text 3 to highlight the Go code in between the {{ and }} markers in my HTML to highlight in Go rather than as plain text.
There must be some way to combine the two. I thought surely one of the golang packages on Package Control would address this but I haven't found one that offers an HTML (Go) syntax like GitHub's Atom editor does by default.
The default highlighting packages will not correctly highlight your templates. You'll need to install Package Control and then install GoSublime.
Once you've done that, open your template file. Then click View > Syntax > GoSublime > GoSublime: HTML.
You should now have {{define "foo"}}{{end}} highlighted as Go and <p>foo</p> highlighted as HTML.